Firn Air Isotope and Temperature Measurements from Siple Dome and South Pole  View Catalog Page Entry ID
NSIDC-0098
Summary
This data set includes d15N, d18O/2, dO2/N2/4, d40Ar/4, d38/Ar/2, d84Kr/48, and d132Xe/96 values for air drawn from the top 15 to 50 m of firn at the South Pole (summer and winter 1998) and a site at Siple Dome (summers 1996 and 1998). Data also include related firn temperature measurements.
The objective of this research was to better understand thermal fractionation processes affecting records of atmospheric history from firn and ice core gases. Recent work (e.g., Severinghaus and Brook, 1999) has exploited trapped air in ice and deep firn as a record of past atmospheric composition and climate change. Interpretation of these paleoclimate archives is complicated by artifacts of thermal diffusion, a process in which heavier gases migrate down temperature gradients toward colder regions in the firn. Seasonal temperature change at the snow surface creates strong temperature gradients in the top few meters of the firn, which cause isotopic fractionation of firn gases. A specific goal of this research is to identify any long-term effects of seasonal temperature fluctuations on firn air isotopic anomalies.
Geographic Coverage
Spatial Coordinates:
N: -89.997°
S: -89.997°
E: -102°
W: -102°
N: -81.667°
S: -81.667°
E: -148.767°
W: -148.767°
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Data Set Citation
Dataset Creator: J.P. Severinghaus, A. Grachev, and M. Battle
Dataset Title: Firn Air Isotope and Temperature Measurements from Siple Dome and South Pole
Dataset Release Date: 2001-01-01
Dataset Release Place: Boulder, CO U.S.A.
Dataset Publisher: National Snow and Ice Data Center (NSIDC)
Data Presentation Form: Table
Online Resource: http://nsidc.org/data/nsidc-0098.html
Data Resolution
Vertical Resolution: 1 to 9 m
Location Keywords
- Continent Antarctica Siple Dome
Science Keywords
- Cryosphere Glaciers/Ice Sheets Ice Sheets FIRN AIR ISOTOPES
- Cryosphere Snow/Ice Snow/Ice Temperature FIRN TEMPERATURE
- Paleoclimate Ice Core Records Ice Core Air Bubbles FIRN AIR
- Paleoclimate Ice Core Records Isotopes FIRN AIR ISOTOPES
- Terrestrial Hydrosphere Glaciers/Ice Sheets Ice Sheets FIRN AIR ISOTOPES
- Terrestrial Hydrosphere Snow/Ice Snow/Ice Temperature FIRN TEMPERATURE
Ancillary Keywords
- Antarctica
- Argon Isotopes
- Atmospheric Gases
- Boreholes
- Firn Air Isotope Measurements
- Firn Air Isotopes
- Firn Isotopes
- Firn Temperature Measurements
- Gas Isotopes
- Ice Core Gas Records
- Isotopic Anomalies
- Isotopic History
- Krypton
- mass spectrometers
- Mass Spectrometry
- Nitrogen Isotopes
- NSIDC
- NSIDC-0098
- Oxygen Isotopes
- Polar Firn Air
- Seasonal Temperature Changes
- Seasonal Temperature Gradients
- Shallow Firn Air
- Siple Dome
- South Pole
- Thermal Diffusion
- Thermal Fractionation
- Trapped Air Bubbles
- Xenon
Platform
- GROUND STATIONS
- GROUND-BASED OBSERVATIONS
Instrument
- FLASKS
- MASS SPECTROMETERS
- THERMISTORS
Data Set Progress
COMPLETE
Originating Center
UCSD/SIO/IGPP
Data Center
National Snow and Ice Data Center
Data Center URL: http://nsidc.org
Data Set ID: NSIDC-0098
Data Center Personnel
Name: NSIDC User Services
Phone: +1 (303) 492-6199
Fax: +1 (303) 492-2468
Email: nsidc@nsidc.org
Contact Address:
National Snow and Ice Data Center
CIRES, 449 UCB
University of Colorado
City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA
NSIDC Antarctic Glaciological Data Center
Data Center URL: http://nsidc.org/agdc/
Data Set ID: NSIDC-0098
Data Center Personnel
Name: NSIDC AGDC User Services
Phone: +1 (303) 492-6199
Fax: +1 (303) 492-2468
Email: nsidc@nsidc.org
Contact Address:
National Snow and Ice Data Center
CIRES, 449 UCB
University of Colorado
City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA
Distribution
Distribution Media: ftp
Distribution Size: 1 to 5 KB per file
Distribution Format: MS Excel or ASCII text files
Fees: None
Personnel
JEFFREY P. SEVERINGHAUS
Role: INVESTIGATOR
Phone: 858.822.2483
Fax: 858.822.3310
Email: jseveringhaus@ucsd.edu
Contact Address:
Scripps Institution of Oceanography
9500 Gilman Dr.
City: La Jolla
Province or State: CA
Postal Code: 92037-0244
Country: USA
A. GRACHEV
Role: INVESTIGATOR
Contact Address:
Scripps Institution of Oceanography,
University of California at San Diego
M. BATTLE
Role: INVESTIGATOR
Contact Address:
Bowdoin College,
Brunswick, Maine
NSIDC USER SERVICES
Role: TECHNICAL CONTACT
Phone: +1 (303) 492-6199
Fax: +1 (303) 492-2468
Email: nsidc@nsidc.org
Contact Address:
National Snow and Ice Data Center
CIRES, 449 UCB
University of Colorado
City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA
Reference
Severinghaus, J.P., A. Grachev, and M. Battle. 2001. Thermal fractionation of air in polar firn by seasonal temperature gradients. Geochemistry, Geophysics, Geosystems [online journal] 2: Paper no. 2000GC000146.
Severinghaus, J.P. and E.J. Brook, 1999. Abrupt climate change at the end of the last glacial period inferred from trapped air in polar ice. Science 286: 930-934.
Metadata Name and Version
Metadata Name: CEOS IDN DIF
Metadata Version: 9.7
Creation and Review Dates
DIF Creation Date: 2001-09-19
Last DIF Revision Date: 2001-10-04
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